Shower stool



FIG. 1 is a front view of a shower stool showing my new design;

FIG. 2 is a side elevational view of the shower stool, the undisclosed side being a mirror image thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof; and

FIG. 5 is a bottom view thereof. 

The ornamental design for a shower stool, substantially as shown and described. 